Theoretical Model For The Optical Properties Of In2O3: Sn Films In The 0.3-50-Âµm range

I. Hamberg; C. G . Granqvist

doi:10.1117/12.966298

2 December 1985 Theoretical Model For The Optical Properties Of In₂O₃: Sn Films In The 0.3-50-µm range

I. Hamberg, C. G . Granqvist

Proceedings Volume 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV; (1985) https://doi.org/10.1117/12.966298
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

We formulate a detailed theoretical model for the optical properties of heavily dopQd oxide semiconductors. The complex dielectric function is expressed as ε = 1+χ^VE+χ^FC+χ^PH, where the χs are susceptibilities due to valence electrons (VE), free carriers (FC), and polar optical phonons (PH). We obtained χ^VE by including a wavelength-shifted Urbach tail of the direct semiconductor transition. χ^FC was calculated from the Gerlach-Grosse theory and accounting for screening of point-like ions within the Random Phase Approximation. Pseudo-potential scattering as well as exchange and correlation effects in the electron gas were considered. χ^PH was specified through emipirically determined damped Lorentz oscillators. The model was applied to In₂0₃:Sn coatings and used to compute their integrated luminous, solar and thermal properties. Optimization of thickness and electron density yielded single coatings on glass with 78% normal solar transmittance and 20% hemispherical thermal emittance.

Citation Download Citation

I. Hamberg and C. G . Granqvist "Theoretical Model For The Optical Properties Of In₂O₃: Sn Films In The 0.3-50-µm range", Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); https://doi.org/10.1117/12.966298

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